<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>

	<%pageContext.setAttribute("PageContext", 18); %>
	<%request.setAttribute("request", 19); %>
	<%session.setAttribute("session", 20); %>
	<%application.setAttribute("application", 21); %>
	
	
	<%=pageContext.getAttribute("PageContext") %>
	<%=request.getAttribute("request") %>
	<%=session.getAttribute("session") %>
	<%=application.getAttribute("application") %>
	
	
	<!-- el -->
	
	
	=================
	${PageContext}
	${request}
	${session}
	${application}
	
	
	<!-- request  不行      session 行 -->
	
	<form action="request2.jsp">
		<!-- <input name="money" value="100" /> -->
		<input type="submit"> 
	</form>
	
	
	<%session.setAttribute("money", 100); %>
	
	

</body>
</html>